Here’s another spooky story from the skies — and this one isn’t just an urban legend. Two pilots fell asleep during an all-night flight between Baltimore and Denver. One pilot woke up to “frantic” calls from air traffic control advising that they were approaching the airport at twice the allowed speed. The pilot was able to safely land the plane with no further problems.

The incident was anonymously documented through NASA’s Aviation Safety Reporting System. Both the airline and pilots are unknown, though the article implies that Frontier Airlines might be to blame.

The airline admits that pilot fatigue is a big problem in the airline industry, but that they have measures in place to help avoid events such as this one.